期刊
CHINESE PHYSICS B
卷 31, 期 9, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1674-1056/ac4a6b
关键词
transmissive coding metasurfaces; polarization control; orbital angular momentum
资金
- National Natural Science Foundation of China [U1931121]
- Natural Science Foundation of Heilongjiang Province in China [ZD2020F002]
- 111 Project to the Harbin Engineering University [B13015]
- Fundamental Research Funds for the Central Universities [3072021CFT2501, 3072021CF2508]
- Postdoctoral Scientific Research Developmental Fund of Heilongjiang Province, China [LBH-Q9097]
In this study, a transmissive anisotropic coding metasurface is proposed, which enables independent control of two orthogonal polarizations. It has been experimentally verified that it can achieve OAM beam of right-handed polarized wave, contributing to the enrichment of polarization manipulation field and the development of transmissive coding metasurfaces.
Coding metasurfaces have attracted tremendous interests due to unique capabilities of manipulating electromagnetic wave. However, archiving transmissive coding metasurface is still challenging. Here we propose a transmissive anisotropic coding metasurface that enables the independent control of two orthogonal polarizations. The polarization beam splitter and the orbital angular momentum (OAM) generator have been studied as typical applications of the anisotropic 2-bit coding metasurface. The simulated far field patterns illustrate that the x and y polarized electromagnetic waves are deflected into two different directions, respectively. The anisotropic coding metasurface has been experimentally verified to realize an OAM beam with l = 2 of right-handed polarized wave, resulting from both contributions from linear-to-circular polarization conversion and the phase profile modulation. This work is beneficial to enrich the polarization manipulation field and develop transmissive coding metasurfaces.
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